Valve-grinding tool



Patented Dec. 119, 1922.

ni *f* s fa vi 'ff rs .CHA1\TDLER R. OTIS, OF SAN FRANCISCO, CALEFORNIA.

VALVE-GRINDING TOOL.

Application filed lTune 18, 1921. Serial No. 478,464.

able device which will simultaneously grind and resurface opposed faces of valves or valvel seats.

The primary object of the invention is 'to provide a device ofthe oharacter described in which the 'grinding or resurfacing elements are arranged to automatically adjust themselves to valves and valve seats of various sizes from the Smallest type of valve to the larger type regardless of the angu-L larity of the Working faces, the said ele- Inents being capable of adjustment to any Vangle from substantlally the Vertical to substantially the horizontal, or in other words, thru approximately 90 of arc.

Another object of the invention is to pro- Vvide in a device of the character described novel means for holding the grinding or braslng elements so as to permit adJustment thereof above' described, which means is of cheap and simple construction, strong` and durable,`and capable of being readily assembled'and dissassembled whereby the renewal of abrasive elements which may become worn may be easily effected.

The invention possesses other advantages and features some of which, with the foregoing will be' set forth at length in the following description where I shall outline in full that Vform of the. invention which I have selected for illustration in the drawings a-ccompanying and forming a part of the present specifioation. In said drawings T have shown one form of the construction of my inve'ntionA``` but it is to he understood that I do not limit myself to sucn form since the invention as expressed in the claims may be embodied in a plurality of forms.

Referriug to the drawings:

Fig. l represents an enlarged 'Vertical sectional view of a valve seat such as employed in internal combustion engines, showing the valve in side elevation and the device of this ing plate for holding` the elements in place.,

' Fig. 4 is an eniarged fragmentary sectional view showing the manner of connecting the abrasive member with the body.

Beferring tothe drawings, l designates an annular valve seat. 2 a valve for Cooperation with the seat, 3 tic valve steni and 4- the spider in which 'the steni is slidable.

The device of my invention comprises a. body generally designated 5, adapted to sur-y round Vthe stem of the valve, and which supports so as to be rotatable thereon and movable V'into position from substantially near the verticalto substantially near the horizontal, a plurality of small preferably cylindrical abrasive elemente or files 0, similar in form lto rat--tail files. These fi'les are adapted to lie between the opposed faces of a valre and seat-in contact with said faces so that when the valve is rotated said clements will abrade or grind said faces, and resurface the latter so as to provide for'thje desired intimate contact or working lit.

The body 5 comprisesfan annula'r disc 'Z provided with a boss-like or upstanding inI` ner edge y8 and having` adjacent saio edge thereof a' circular seriesof openings 9. The members 6 are loose and rotatable within said openings and have heads 10 upon their inner ends, which heads engage the inner face of the annular locking plate 11. The

Adisc 5 has a plurality of depending spring clips 12 around its outer edge, which clips holdthe looking;` plate in close engagement with the under side of the disc.y The inA ner edge of the looking plate is turned upwardljv` slightlyfi and spaced fr ni the upturned portion 8 of the disc'? so as to provide sufiicient space tov accommodate the he'ads Ll0 of the files h and per'" 't fflw movenient of said files but so to iold files in place as shown in Figs. l and By use of the spring cllps the looking plate maybe quickly and easily removed or itied into place.

A helical expansion spring 173 is secured shown in -Figs 1 and 3. The other end of the spring is adapted to engage the spider 4 so as to hold the body 5 and files 6 in position to opcrate upon the valve in its seat.

To use the tool or device of my inyention, the valrc is removed and 'the Stein 3 is in sorted back in place so as to extend thru the body 5 and spring` 13 as shown in'Fig. l., whereupon the files or abrasive members 6 will be disposed between the opposed faces of the valye and its seat. Upon ,turning the yalve in the ordinarymanner as is cus tomary in grinding or resurfacing, byuse of a tool, not shown-y` the cylindrical abrasiye members will be rotzntedv and in so doing will abrade the opposed faces and resurface them so that they will be groundfor close and proper working contact. The small circnlar abrasive elements provide for ,etlicicnt and expeditious o'rindino' action much more so than is the case withythe ordinary grinding conipounds commonly used for fitting, grinding: and dressing valves vand seats. In the event thatone or more of the files becomes worn and replacement thereof Jis necessary, this can be quickly and easily of :i body such as the one 5, which holds a.

plurality of abrasive members so that the letter are rotatable and movable thru substantially 90 of arc, whereby the device is applicable to valves of various sizes and having` various angles as to their opposed faces. v 7

The snbstantially fiat body with no projcction or obstruction around the outer edge thereof, provides for adjustment of the abrasive members so that the device may be used with valves of the larger sizes as well as with very small valves and their seats. The body is for the 'most part below the plane of the lower ends of the-:members 6. i i V Iolaimz, y m ,v y l. A. valve erinding device comprising a body portion thru which the stem ofa yalye to be ground is inserted, al plurality of abrasive members supported and arranged on the body so ,as to be rotatable between'and in engagement with the opposed faces of the yalve and its seat andl to be. movable thru nular members.

niso/Lio body having a `circvular series of openings thei'eim a*pluralit-yfof cylindrical abrasiyje members mounted loosely and 'for rotation in said openings, heads on thev inne'r ends of ysaid members of larger diameterthan'the lopenings7` spring clips depending from said body, alocking plate removablyheld against 1the nnder vside of the -body in engageinent with said heads by saidsp'ring clips.

4. A valve grindlng tool compri'smg a body member ,adapted to surround a valye steni, an annular member'supported upon said member ,and having' a plurality'of radia-l openings therethru and pili-like projecting members ,revoly'able insaid openings. `4

'Av valve grinding 'tool comprsing'a member adaptedfto be lmounted upon a yalve steni/,an annular member supportedvby said member and having a 4'pluralityjof radial ,opcnings thereiny pinlilie projecting menihers reyolvablein said openings and jheads `on the linner ends fofisai'd members.v

(3. :i vfalve fggfindino tool comprising a n'iernberadapted tosurround a valve stem, an an- ,nular' membersupported by said member andhaving a plurality ofradial openings therein, pinlike vyp'ijojeotir'ig` members reyolv- `able in said openings, headson the inner onds of ysaid projecting4members'and an annular memberon ,the first namedlmember spaced circumferentially from a partfof the annular member'yhavingv openings therein, said heads being ,disposed between said van- 7. A valve tool conmrising a body meni'- `bei'7 a plurality l ,off members adjnstably -mounted upon and vprojecting loutwardly 'from thebodymember yand arranged to eng'age betweena valveand its seat, said projec-tmg members bemgfrce at'their outer ends..

CHANDLER y 'oris 

